A public inquiry, external, led by Judge Sir Brian Langstaff, is due to present its final report on 20 May.
It began in 2019 and aimed to examine the deaths of more than 3,000 people who died after contracting HIV or hepatitis C via NHS treatments in the 1970s and 80s.
Patients with haemophilia and other blood disorders became unwell after being treated with factor VIII or IX.
The medication was imported from the US where it was made using pooled blood plasma from paid donors, some of whom came from high-risk groups including prisoners and drug-users.
An interim report stated that wrong was done on individual, collective and systemic levels and it is expected to definitively conclude whether medical ethics codes were observed.